Moteurs Baudouin 12M26 Series, Operation & Maintenance Manual

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Operation & Maintenance Manual for 12M26 Series Gas Engine
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Table 1-2 Main performance parameters of 12M26 natural gas engine
Category Unit 12M26 natural gas engine
Engine model 12M26 12M26D605E300NG 12M26D660E301NG
Type —
V-engine, 4-stroke water-cooling, wet sleeve, Venturi mixture,
closed-loop control, sparking plug ignition
Number of cylinder — 12
Valve per cylinder — 4
Speed r/min 1500 1800
Rated power kW 550 605
Overload power kW 605 660
Table 1-3 Tightening torque of main bolts and nuts
Bolt name
Bolt
specification
Tightening torque (N•m)+Re-twist angle (°)
Allowable
number of
repetition
Spark plug
M14
×
1.25
（ 25 ～ 28 ） N•m
Oxygen sensor M18
×
1.5 （ 50±5 ） N•m
Water temperature sensor M12
×
1.5 （ 25±5 ） N•m
① The corresponding requirements are posed on the strength grade of bolts and nuts used on the different
parts of the engine, and bolts and nuts of the same specifications but different strength grades may not be
mistaken or exchanged. The allowable number of repetition may not be exceeded. Otherwise serious
consequences may occur.
② Other torque of main bolts was seen in appendix 1.